Abstract: In order to produce large amount of mycelia of Ganoderma capense (Lloyd) Teng by submerged culture technique, a study has been made on the fermentation conditions of the fungus. The mycelium of this fungus under submerged condition is colorless, filamentous, septate and branched.The following optimal conditions were verified, the medium composition (No.4): 4.0% sucrose, 2.0% soybean cake meal, 0.15% KH₂PO₄, 0.075% MgSO₄·7H₂O and 0.05% (NH₄)₂ SO₄, with natural pH, optimal amount of inoculum being 10%, rate of aeration 0.3～0.5 (v/v/rain.). The inoculated cultures were incubated at 24～26℃ for 5～6 days.Fermentation is usually stopped as the pH dropped to about 5.0 and residual sugar to aboul 0.3%.